DES Y3 + KiDS-1000：宇宙剪切巡天的自洽宇宙学联合
宇宙学与河外天体物理
2023-10-24 v2
摘要
我们展示了暗能量巡天（DES Y3）与千平方度巡天（KiDS-1000）在两个巡天团队协作下的联合宇宙剪切分析。我们发现DES Y3与KiDS-1000的宇宙学参数约束一致，当在联合巡天分析中结合时，以均值约束参数。其均值边际低于最大后验估计，这是由于边际分布中的偏态以及多维参数空间中的投影效应。我们的结果与Planck对宇宙微波背景的观测给出的约束一致，在水平上相符。我们采用了一种混合分析流水线，该流水线源自量化各巡天团队最初采用的不同分析选择影响的模拟巡天研究。我们审视了内禀对齐模型、重子反馈减缓策略、先验、采样器以及非线性物质功率谱模型。
引用
@article{arxiv.2305.17173,
title = {DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys},
author = {Dark Energy Survey and Kilo-Degree Survey Collaboration and : and T. M. C. Abbott and M. Aguena and A. Alarcon and O. Alves and A. Amon and F. Andrade-Oliveira and M. Asgari and S. Avila and D. Bacon and K. Bechtol and M. R. Becker and G. M. Bernstein and E. Bertin and M. Bilicki and J. Blazek and S. Bocquet and D. Brooks and P. Burger and D. L. Burke and H. Camacho and A. Campos and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and R. Cawthon and C. Chang and R. Chen and A. Choi and C. Conselice and J. Cordero and M. Crocce and L. N. da Costa and M. E. da Silva Pereira and R. Dalal and C. Davis and J. T. A. de Jong and J. DeRose and S. Desai and H. T. Diehl and S. Dodelson and P. Doel and C. Doux and A. Drlica-Wagner and A. Dvornik and K. Eckert and T. F. Eifler and J. Elvin-Poole and S. Everett and X. Fang and I. Ferrero and A. Ferté and B. Flaugher and O. Friedrich and J. Frieman and J. García-Bellido and M. Gatti and G. Giannini and B. Giblin and D. Gruen and R. A. Gruendl and G. Gutierrez and I. Harrison and W. G. Hartley and K. Herner and C. Heymans and H. Hildebrandt and S. R. Hinton and H. Hoekstra and D. L. Hollowood and K. Honscheid and H. Huang and E. M. Huff and D. Huterer and D. J. James and M. Jarvis and N. Jeffrey and T. Jeltema and B. Joachimi and S. Joudaki and A. Kannawadi and E. Krause and K. Kuehn and K. Kuijken and N. Kuropatkin and O. Lahav and P. -F. Leget and P. Lemos and S. -S. Li and X. Li and A. R. Liddle and M. Lima and C. -A Lin and H. Lin and N. MacCrann and C. Mahony and J. L. Marshall and J. McCullough and J. Mena-Fernández and F. Menanteau and R. Miquel and J. J. Mohr and J. Muir and J. Myles and N. Napolitano and A. Navarro-Alsina and R. L. C. Ogando and A. Palmese and S. Pandey and Y. Park and M. Paterno and J. A. Peacock and D. Petravick and A. Pieres and A. A. Plazas Malagón and A. Porredon and J. Prat and M. Radovich and M. Raveri and R. Reischke and N. C. Robertson and R. P. Rollins and A. K. Romer and A. Roodman and E. S. Rykoff and S. Samuroff and C. Sánchez and E. Sanchez and J. Sanchez and P. Schneider and L. F. Secco and I. Sevilla-Noarbe and H. -Y. Shan and E. Sheldon and T. Shin and C. Sifón and M. Smith and M. Soares-Santos and B. Stölzner and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and C. To and M. A. Troxel and T. Tröster and I. Tutusaus and J. L. van den Busch and T. N. Varga and A. R. Walker and N. Weaverdyck and R. H. Wechsler and J. Weller and P. Wiseman and A. H. Wright and B. Yanny and B. Yin and M. Yoon and Y. Zhang and J. Zuntz},
journal= {arXiv preprint arXiv:2305.17173},
year = {2023}
}
备注
40 pages, 21 figures, 15 tables, accepted Open Journal of Astrophysics. Download the chains from https://des.ncsa.illinois.edu/releases/y3a2/Y3key-joint-des-kids or create your own chains with CosmoSIS using https://github.com/joezuntz/cosmosis-standard-library/blob/main/examples/des-y3_and_kids-1000.ini Watch the core team discuss this analysis at https://cosmologytalks.com/2023/05/26/des-kids